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Ingenious Device for Displaying Banners Using Energy Conservation Principles

This innovative device demonstrates energy conservation principles in a fun and engaging way by executing a sequence of actions to display a banner. A hammer swings to strike a stationary marble, causing it to roll down ramps and finally hit a toy car. The car travels down a track, proudly showcasing the banner. Key concepts explored include conservation of translational and rotational energy, linear momentum, and rotational motion. Constructed from inexpensive materials, the total cost came to just $15, showcasing an effective design for educational purposes.

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Ingenious Device for Displaying Banners Using Energy Conservation Principles

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  1. Mr. Simple Ashraf El-messidi, Chris Kilby, Travis Pearce, & Clayton Thomas

  2. Overview This device performs several steps to complete the simple task of displaying a banner. A hammer swings from its resting position to hit a marble. This ball rolls down multiple ramps, changing direction along the way. Finally the ball hits a car, which rolls down a track, displaying our banner.

  3. Concepts • Conservation of Translational Energy • Ball falling and rolls • Conservation of Rotational Energy • Rotating hammer hits ball at rest • Conservation of Linear Momentum • Ball hits car • Rotational Motion • Hammer Swinging • Center of Mass • Car rest with over half of body over the edge

  4. Calculations • Velocity of hammer • Gh=.5v^2 + .5Iw^2 • V=11 ft/sec = 29.3 radians/sec • Initial Velocity of ball • m1v1+m2v2=m1v1’+m2v2’ • V of ball=12.36 ft/sec • Other calculations could not be performed because the coefficient of restitution could not be found for the ball hitting the car

  5. Cost/Conclusion • Nothing was purchased. The following is a list of estimated cost. • Toy car: $2 • Scrap wood: $4 • Marble: $1 • Paper, string, cardboard, and other small items: $2 • Most expensive purchase was a 4 pack of sharpies that included the orange sharpie we needed. This was $6 • Total Cost: $15 • This was the most effective, consistent, and cost efficient design we could build.

  6. Thanks

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